Write barrier for storing a code entry, and usage in CompileLazy builtin.

src/mips64/macro-assembler-mips64.h

Index: src/mips64/macro-assembler-mips64.h
diff --git a/src/mips64/macro-assembler-mips64.h b/src/mips64/macro-assembler-mips64.h
index 117d25e7de8c2fbd827ec4b8409cb4a137fc2825..77a9c92056da2dad7e943152cec836bb103c1375 100644
--- a/src/mips64/macro-assembler-mips64.h
+++ b/src/mips64/macro-assembler-mips64.h
@@ -456,6 +456,11 @@ class MacroAssembler: public Assembler {
                      pointers_to_here_check_for_value);
   }
 
+  // Notify the garbage collector that we wrote a code entry into a
+  // JSFunction. Only scratch is clobbered by the operation.
+  void RecordWriteCodeEntryField(Register js_function, Register code_entry,
+                                 Register scratch);
+
   void RecordWriteForMap(
       Register object,
       Register map,